Behavior of cobalt oxide electrodes during oxidative processes in alkaline medium
2007; Elsevier BV; Volume: 53; Issue: 2 Linguagem: Inglês
10.1016/j.electacta.2007.01.085
ISSN1873-3859
AutoresSimonetta Palmas, Francesca Ferrara, Annalisa Vacca, Michele Mascia, A.M. Polcaro,
Tópico(s)Analytical Chemistry and Sensors
ResumoThe behaviour of Co3O4 electrodes was investigated in alkaline solution during oxidative runs at different anodic potentials up to the value of oxygen evolution reaction (OER). Voltammetric results indicate the presence of several solid-state surface redox transitions (SSSRT) which lead to the formation of Co(IV) containing species which are the specific catalytic phases for OER. Electrochemical impedance measurements were done in different ranges of potential and frequency in order to better characterise the SSSRT and the capacitive response of the electrode/electrolyte interface.
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